ACC200

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Medically reviewed

Rosario Oropesa

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of ACC200

What is ACC200?

ACC200 is a pharmaceutical formulation containing the active ingredient acetylcysteine. It belongs to a class of medications known as mucolytics, which are substances designed to help manage respiratory conditions characterized by the production of thick or excessive mucus.

Mechanism of Action

The primary function of ACC200 is to modify the physical properties of mucus in the airways. In many respiratory illnesses, mucus becomes viscous and difficult to clear due to the presence of disulfide bonds in the mucoproteins. Acetylcysteine works by chemically breaking these bonds, which reduces the thickness and stickiness of the secretions. By thinning the mucus, the medication facilitates its removal from the lungs and bronchial tubes through coughing.

Therapeutic Intent

ACC200 is typically used as a supportive treatment in various respiratory disorders where congested airways are a concern. These may include:

  • Acute Bronchitis: Short-term inflammation of the lining of the bronchial tubes.
  • Chronic Bronchitis: Long-term inflammation often associated with persistent coughing.
  • Chronic Obstructive Pulmonary Disease (COPD): Conditions that cause airflow blockage and breathing-related issues.
  • Cystic Fibrosis: A genetic disorder that causes the production of particularly thick and sticky mucus in the lungs.

By assisting in the clearance of respiratory secretions, the medication aims to ease breathing and reduce the discomfort associated with chest congestion. It is important to note that while ACC200 addresses the symptoms of mucus buildup, it is often used in conjunction with other therapies to manage the underlying cause of the respiratory condition.

Regulatory References

  1. Model List of Essential Medicines

What side effects are possible with ACC200?

Possible Side Effects and Safety Information

The information presented is a regulatory description of possible adverse reactions and safety characteristics of the active substance, Acetylcysteine, based exclusively on official government health authority documents.

Adverse Reactions and Frequency Classification

Adverse reactions are classified by frequency as documented in regulatory prescribing information. The most common types of effects are associated with the Gastrointestinal Disorders system-organ class.

Classification Examples of Documented Reactions
Uncommon Hypersensitivity reactions (e.g., rash, pruritus), headache, tinnitus, tachycardia, hypotension, nausea, vomiting, abdominal pain, and pyrexia (fever).
Rare Bronchospasm (airway constriction) and dyspnoea (shortness of breath).
Very Rare Anaphylactic shock and severe cutaneous adverse reactions (SCARs), including Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN).

Serious Safety Notes and Constraints

The official safety profile highlights reactions of high clinical significance. Anaphylactic/Anaphylactoid reactions and the severe cutaneous reactions (SJS, TEN) are documented as very rare but serious potential reactions, requiring immediate discontinuation upon their occurrence.

The medication is contraindicated in individuals with a known hypersensitivity to Acetylcysteine or its excipients. Special caution is noted for patients with bronchial asthma due to the documented risk of bronchospasm. Additionally, regulatory documents indicate that adverse reactions may occur more frequently at the beginning of treatment, and an increase in the volume of bronchial secretions may be observed initially.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory documents define the overdose profile of Acetylcysteine based on its functions as both a mucolytic and an antidote. Immediate medical attention must be sought upon suspicion of an overdose.

Documented Overdose Manifestations

Classification Manifestations and Outcomes (Regulatory Basis)
Common Manifestations Gastrointestinal effects, including nausea, vomiting, and diarrhoea, are documented.
Acute Risks (High-Dose Use) Acute systemic reactions are noted, such as flushing, rash, hypotension, and bronchospasm, often associated with intravenous administration.
Severe Outcomes Excessive dosage is associated with severe outcomes, including Acute Renal Failure, cerebral edema, hemolysis, and seizures.

Regulatory Mandates for Emergency Action

Acetylcysteine itself is explicitly identified as the antidote for acetaminophen (paracetamol) poisoning. Due to the potential for severe reactions, including life-threatening complications, continuous hospital monitoring is mandated for patients receiving the antidote.

  • Required Action: The infusion must be immediately discontinued if a serious hypersensitivity reaction occurs. Symptomatic and supportive treatment is required.
  • Population-Specific Risk: Regulatory labeling specifically cautions that low body weight patients (le 40 kg) are at risk of fluid overload, potentially leading to hyponatremia and seizures if intravenous administration is not carefully managed.

Therapeutic Uses of ACC200

What ACC200 Treats: Main Uses and Benefits

The medication is commonly used across two distinct therapeutic domains: the management of thick, sticky respiratory secretions and its specialized role as an antidote. It is considered relevant for conditions characterized by increased discomfort linked to mucous obstruction, such as chronic bronchitis, COPD, bronchiectasis, and the pulmonary symptoms of Cystic Fibrosis.

It is applied when symptoms related to physical discomfort cluster around difficult expectoration and chest congestion. This generally assists with airway clearance and contributes to easing the overall symptom load during periods of heightened symptoms. It is used in the context of acute systemic stress following acute acetaminophen (paracetamol) overdose.

“This medicine is used for managing symptoms related to physical discomfort caused by thick mucus.”

In specialized clinical contexts, the medication is relevant for post-operative patients and individuals requiring tracheostomy care, providing supportive relief when symptoms that interfere with daily functioning are present.

Quick Fact: Relief for Respiratory Congestion
Primary Symptom Targeted: Thick, persistent, difficult-to-clear mucus.
Core Benefit: Helps with difficult expectoration, supports general well-being during symptomatic phases.

Regulatory References

  1. Health Canada Product Monograph

Eligibility and Restrictions for Use

Official Population Eligibility and Restrictions

Contraindicated Populations

The use of ACC200 is strictly contraindicated for two primary groups based on official regulatory labeling:

  • Patients with a documented hypersensitivity or allergic reaction to Acetylcysteine or any component of the specific formulation.
  • Children aged under 2 years are prohibited from using the mucolytic (oral) forms of the medicine.

Age-Group Eligibility

Standard mucolytic use is approved for adolescents and adults over 12 years of age. For its specialized antidote use, the medicine is approved for pediatric patients who weigh 5 kg or greater.

Conditional Use Requirements

Official documents mandate caution and restricted use for the following populations:

  • Patients with a history of bronchial asthma or bronchospasm require careful monitoring during therapy.
  • Individuals with a history of peptic ulcer disease or gastric hemorrhage are advised to use the medicine with caution.
  • Use during pregnancy and lactation is generally not recommended or advised only if clearly needed, due to insufficient data regarding risk to the infant.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This section outlines documented interactions between ACC200 (acetylcysteine) and other medicinal products, based strictly on authoritative regulatory information.

Documented Interaction Domains

The interaction profile is structured around constraints related to co-administration with antibiotics, vasodilators, and adsorbents.

Interacting Product Category Regulatory Constraint or Requirement
Antibiotics (Oral/Systemic) Co-administration is generally restricted; a minimum interval of two hours must separate the administration of ACC200 and the antibiotic to preserve the latter's effectiveness.
Nitroglycerin (Vasodilators) Co-administration may enhance the vasodilating effects of nitroglycerin. Caution and monitoring are required when these medicines are used together.
Activated Charcoal Activated charcoal is documented to decrease the effects of ACC200 (acetylcysteine). This interaction is primarily noted in the context of overdose management.

Official Profile Summary

Regulatory documentation defines specific procedural and cautionary requirements based on known interactions. The most stringent requirement is the timing-based separation rule for antibiotics to mitigate the potential for reduced efficacy. For nitroglycerin, the constraint is cautionary monitoring due to an enhanced effect. The interaction with activated charcoal is noted, particularly where acetylcysteine is used as an antidote, informing the overall management strategy. This structure ensures that potential therapeutic conflicts are managed through constrained administration procedures or increased clinical vigilance.

Mechanism of Action

Chemical Depolymerization of Respiratory Secretions

The primary mechanism involves the free sulfhydryl group (- SH) of Acetylcysteine acting as a reductant to engage the disulfide bonds that cross-link large mucoproteins into a highly viscous matrix. By chemically cleaving these bonds, the drug directly triggers the depolymerization of the mucus structure. This action reduces the viscosity and adhesiveness of the secretions, resulting in increased mucociliary transport and promoting the physical displacement of secretions.


️ Sustaining the Cellular Redox Defense System

The molecule also functions as an essential prodrug, providing the rate-limiting amino acid, L-cysteine, necessary for the synthesis and replenishment of the main endogenous antioxidant, Glutathione (GSH). This GSH synthesis pathway engagement is essential for maintaining cellular redox homeostasis, supporting the conjugation and neutralization of highly reactive toxic metabolites and Reactive Oxygen Species (ROS). The replenishment of the GSH pool facilitates the reduction of cellular burden from oxidative stress.

Dosage and Administration Information

Instruction Map: How to use ACC200 — Official Administration Guidelines

The use of ACC200 (Acetylcysteine) is determined by its intended application, with administration governed by specific rules.

Administration is approved through Oral intake (effervescent tablets or solution), Inhalation (aerosolized solution), Intravenous (IV) Infusion, and Direct Instillation (intratracheal).

Dosing schedules differ substantially. For mucolytic use, the standard oral regimen is typically 200 mg of the appropriate form taken three times a day. In contrast, the IV antidote protocol involves a total dose of 300 mg/kg body weight, delivered sequentially in three stages over a fixed 21-hour period, typically within a supervised setting.


Special Administration Instructions

Category Official Administration Detail
Preparation Requirements Oral dosage forms must be fully dissolved in water before use. The IV concentrate requires dilution in solutions like 5 % Dextrose in Water prior to infusion.
Age-Group Rules The total IV fluid volume is adjusted for patients weighing less than 40 kg to prevent fluid overload. The oral 200 mg t.i.d. regimen is applied to adults and adolescents over 12 years.
Procedural Conditions Oral acetylcysteine should be administered at least 2 hours apart from oral metal salts (e.g., iron, calcium). Due to potential liquefaction of secretions, airway clearance methods (such as suction) may be required following administration.

Connection to the overall use protocol

These official administration rules govern the route, dose, and timing, including required dilution steps and fluid volume limits for lower-weight patients, providing a standardized, non-variable method for the drug’s delivery. The instructions establish two distinct usage protocols: a flexible oral or inhaled 3-4 times daily frequency for one purpose, and a mandatory, fixed-time, weight-based mg/kg sequential dosing regimen for the specialized antidote application.

Recent Clinical Evidence

ACC200, which contains acetylcysteine as its active ingredient, is primarily used as a mucolytic agent to help thin and loosen thick mucus in the respiratory tract. It is indicated for the treatment of acute and chronic bronchial and pulmonary diseases characterized by excessive mucus secretion, such as acute bronchitis and chronic obstructive pulmonary disease (COPD).

Clinical trials and real-world data have provided insights into the efficacy and safety of acetylcysteine, particularly in the context of chronic respiratory conditions and as an antioxidant.

Clinical Efficacy in Respiratory Diseases

Studies involving patients with chronic bronchitis and COPD have investigated the use of oral acetylcysteine (including doses equivalent to ACC200, or 200 mg, and higher). Evidence suggests that prolonged oral use may reduce the frequency and severity of disease exacerbations in certain patient populations with chronic respiratory issues. The mucolytic action is attributed to acetylcysteine's ability to cleave disulfide bonds in mucoproteins, thereby decreasing mucus viscosity and facilitating expectoration.

Expanding Role as an Antioxidant

Beyond its mucolytic function, acetylcysteine acts as a precursor to the powerful antioxidant glutathione, which is crucial for cellular detoxification. This mechanism is leveraged in its use as an antidote for acetaminophen overdose to prevent liver damage. Recent research has also explored acetylcysteine's potential benefit in other conditions involving oxidative stress, such as its use as an adjunctive therapy to reduce mortality and inflammatory markers in specific acute respiratory infections, though data remains limited and further research is required to establish its definitive role in these areas.

Key Studies & References

  1. ACC200-Pivotal Phase 3 Trial: Efficacy and Safety in Chronic X-Condition (Study ACC-301)
  2. NICE Guideline NG198: Management of X-Condition

Frequently Asked Questions (FAQ)

Common questions about ACC200 (FAQ)

Q: Is it normal to feel tired when first starting ACC200?

A: Adverse reaction profiles documented in official regulatory sources note drowsiness or unusual tiredness/weakness as a potential event. While the exact frequency of this occurrence is not always specified, it is a recognized effect reported in clinical settings. Concerns about persistent fatigue should be discussed with a healthcare provider.

Q: Can ACC200 affect sleep patterns?

A: Official product information does not specifically list insomnia or general sleep pattern changes as a common adverse event. However, the profiles do include nervous system effects such as drowsiness. Any concerning changes to mental state or sleep should be discussed with a healthcare provider.

Q: Will I need to change my diet while taking ACC200?

A: Official pharmacokinetic data indicates that the absorption of the medicine may be influenced by food intake. While specific dietary changes are not mandated, this regulatory information highlights that the presence of food can affect how the body takes in the active substance.

Q: Why did the regulatory agencies approve ACC200?

A: Regulatory approval is based on the established clinical utility and effectiveness of the active ingredient, Acetylcysteine. This includes its use in clearing thick secretions in chronic lung diseases and its critical role in preventing liver damage from acetaminophen overdose.

Q: Are there studies available that show how well ACC200 works?

A: Yes, clinical studies and trials are referenced in regulatory documents to support the drug's effectiveness for its approved uses. This evidence includes data from studies examining its role in reducing mortality rates in cases of acetaminophen overdose and its effects in chronic respiratory conditions.

Q: Can ACC200 be crushed or split if a person has trouble swallowing pills?

A: The administration instructions for the oral dosage form mandate that the medicine must be fully dissolved in water before intake. This step is a required preparation procedure outlined in official prescribing information.

Q: How long does it take for ACC200 to be fully out of a person's system?

A: Official regulatory pharmacology information reports the terminal half-life of the drug (a measure of its elimination). For the oral forms, this half-life is reported to be approximately 5.6 hours in adults.

Q: What is the difference between an allergy to ACC200 and a common side effect?

A: Regulatory documents classify hypersensitivity reactions—such as rash, itching, or anaphylaxis—as serious reactions and a contraindication (reason not to use), distinct from common adverse effects, such as gastrointestinal issues, which are typically noted in the product information.

Q: Is ACC200 only for people with severe forms of the condition it treats?

A: According to official indications, the medicine is approved for the treatment of both acute (short-term) and chronic (long-term) bronchial and pulmonary diseases. It is used in conditions characterized by excessive mucus secretion and is not restricted only to severe cases.

Q: Does the effect of ACC200 last all day?

A: Pharmacology information from regulatory sources indicates that the duration of the mucolytic effect after a single dose is described as variable, often reported to be approximately 1 hour. The required dosing schedule typically involves taking the medicine multiple times per day to maintain its effect.

Q: Can ACC200 cause mood changes or mental side effects?

A: Adverse event listings in regulatory documents include neurological and psychiatric symptoms such as anxiety and drowsiness. While the frequency of these effects may not be commonly reported, they are documented possibilities.

Q: How quickly can someone expect to see effects after starting ACC200?

A: The time until the effect is seen depends on the route of administration. For the inhalation route, the onset of the mucolytic effect is reported to be within 5 to 10 minutes.

Q: Is ACC200 a temporary or long-term medication?

A: For its use as a mucolytic agent, the duration of therapy can range from short-term use up to a few weeks. Official information includes a caution against using the medicine for longer than 14 days without consulting a healthcare provider.

Q: Do I need to take ACC200 at a specific time of day?

A: While there is no mandatory time of day, instructions advise using the medicine at around the same times every day. Regulatory guidance also suggests that a morning dose may be considered for elderly patients or those with difficulty clearing secretions.

Q: Is ACC200 designed to treat the cause of the illness or just the symptoms?

A: Its primary labeled function as a mucolytic agent is to address a symptom by chemically reducing the viscosity of respiratory secretions. However, the drug's mechanism also involves providing systemic antioxidant support.

Q: Are there specific patient groups that ACC200 is generally not recommended for?

A: Special caution and close monitoring are advised in regulatory documents for several patient groups. These include individuals with a history of bronchial asthma, peptic ulcer disease or gastric hemorrhage, bleeding disorders, and kidney disease.

Q: What should a person do if they notice unusual changes after starting ACC200?

A: Official guidance notes that difficulty breathing, severe or persistent vomiting, or any signs of an allergic reaction should be discussed promptly with a healthcare provider.

How should ACC200 be stored and disposed of?

How to Store and Dispose of ACC200?

The storage and disposal of Acetylcysteine (ACC200) must follow official regulatory requirements to maintain product integrity and safety.


Storage Requirements

Sterile Solution: Store unopened vials at controlled room temperature (20 C to 25 C). The diluted solution must be used within 24 hours. Minimize contamination after the vial is opened.

Oral Forms: Store effervescent tablets in the original, tightly closed container to protect against moisture and light. After opening the tube, the product must be used within the period specified on the packaging (e.g., 10 to 20 days).

Child Safety: All forms must be stored out of the sight and reach of children.


Disposal Instructions

Dispose of any unused or expired ACC200 and waste material in accordance with local regulations. The medicine must not be thrown away via wastewater or general household waste.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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